Browser-based math calculators for everyday use — 10 percentage calculators in one: find percentages, calculate GST, discounts, tips, marks, profit & loss, and more. All results update in real time with no server required.
A comprehensive percentage calculator covering all everyday scenarios: find what X% of Y is, calculate percentage change between two values, work out discounts and sale prices, compute GST inclusive/exclusive amounts for Indian tax slabs (5%, 12%, 18%, 28%), calculate tip amounts and split bills, convert marks to percentage and grade, calculate profit & loss percentage, and reverse-calculate original values from percentages. All 10 calculators update in real time as you type.
| Calculation | Formula | Example |
|---|---|---|
| X% of Y | (X / 100) × Y | 20% of 500 = 100 |
| X is what % of Y | (X / Y) × 100 | 40 of 200 = 20% |
| Percentage change | ((New − Old) / Old) × 100 | (120−100)/100 = 20% increase |
| Add GST | Price × (1 + GST/100) | 1000 + 18% GST = ₹1,180 |
| Remove GST | Inc. price / (1 + GST/100) | 1180 / 1.18 = ₹1,000 |
| Discount price | Price × (1 − Disc/100) | 500 − 30% = ₹350 |
| Profit % | ((SP − CP) / CP) × 100 | (600−500)/500 = 20% profit |
| Marks % | (Obtained / Total) × 100 | 450/600 = 75% |
The formula is: result = (X / 100) × Y. For example, 20% of 500 = (20 / 100) × 500 = 100. Use the Percentage Calculator's "What is X% of Y" tab — enter both values and the result updates instantly.
Percentage change = ((new value − old value) / old value) × 100. If the result is positive, it is a percentage increase. If negative, it is a percentage decrease. The Percentage Calculator's "Percentage Change" tab handles both increases and decreases automatically.
To add GST: GST amount = (price × GST rate) / 100; total = price + GST amount. To remove GST from an inclusive price: original price = (inclusive price × 100) / (100 + GST rate). The Percentage Calculator includes a dedicated GST calculator that handles both addition and extraction for the common Indian GST slabs (5%, 12%, 18%, 28%).
Discount percentage = ((original price − sale price) / original price) × 100. To find the final price after a discount: final price = original price × (1 − discount% / 100). The Percentage Calculator's Discount tab lets you work in either direction — enter the discount percentage to get the price, or enter both prices to get the discount percentage.
Marks percentage = (marks obtained / total marks) × 100. For example, 450/600 = 75%. The Percentage Calculator includes a Marks/Grade tab where you can enter your score and maximum marks to get the percentage and corresponding grade.
Profit % = ((selling price − cost price) / cost price) × 100. Loss % = ((cost price − selling price) / cost price) × 100. If selling price > cost price, it is a profit. If lower, it is a loss. The Percentage Calculator's Profit & Loss tab calculates both profit/loss amount and the percentage automatically.
Tip amount = (bill amount × tip percentage) / 100. Total = bill + tip. For a ₹800 restaurant bill with a 10% tip: tip = ₹80, total = ₹880. The Tip Calculator tab also splits the total between multiple people if needed.
X is what % of Y: result = (X / Y) × 100. For example, 40 is what % of 200? = (40 / 200) × 100 = 20%. This is the "X is what % of Y" tab in the Percentage Calculator.
If you know the result and the percentage applied: original = result / (percentage / 100). For example, if 80 is 40% of some number: original = 80 / 0.4 = 200. The Percentage Calculator includes a reverse percentage tab for this exact calculation.
For most Indian universities using a 10-point CGPA scale, the common conversion is: percentage = CGPA × 9.5. For a CGPA of 8.0: percentage = 8.0 × 9.5 = 76%. Some universities use different multipliers — check your institution's official conversion formula. The Marks/Grade calculator supports CGPA conversion.
CAGR = ((ending value / beginning value)^(1/years) − 1) × 100. For example, an investment growing from ₹1,00,000 to ₹1,61,051 in 5 years has a CAGR of 10%. The Percentage Calculator's Percentage Change section handles multi-period growth calculations.
Yes. All math and calculator tools on DDaverse are completely free with no account, no subscription, and no usage limits. Every calculation runs instantly in your browser.
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